Hot airjdamper



Patented July 22, 1924+.

CYRUS s. noon, on oonnnvo, NEW YORK.

HGT-AIR Application filed June 1,

Be it known that I, CYRUS S. HooD, a

citizen of the United States, and resident of Corning, in the county of Steuben and State of New York, have invented certain new and useful Improvements in Hot-Air Dampers, of which the following is a specification.

My present invention relates to the simple means for diverting air into a distributing pipe of hot air furnaces where the conditions are such that ordinarily such pipe will not tap oif the required amount of hot air.

A particular case is the so-called one pipe furnace sometimes called the pipeless furnace. While these furnaces mayheat the whole house averagely well, some special.

room cannot get as much heat as-it needs.

In such case the attempt is frequently made to tap off a separate pipe leading to such room. The main draft,however, is so. strong in the direction of the single pipe exit that the tap pipe seldom takes off enough heat.

To fit this and other cases where a hot air furnace pipe does not get enough hot air, I have devised my present invention which comprises a deflecting or gathering element projected in the path of the main draft and provided with a simple but effective form of two-way damper whereby the normal main draft may pass practically unobstructed when heat is not required through the tap pipe, but which may be thrown to deflect air into such pipe, when desired. The size and projected area of the deflector will be apportioned to the size of the tap p1 e.

The above and other features of my invention will be more fully understood from the following detailed description in connection with the accompanying drawings, in which Fig. 1 is a vertical section showing my invention applied to a single pipe furnace.

Fig. 2 is a section on the line 22, Fig. 1, looking in the direction of the arrows.

Fig. 3 is an enlarged detail section similar to Fig. 1, but showing in detail the deflecting flap or valve and the means for operating it.

Fig, 4 isa section on the line 4 4, Fig. 3' showing a modification.

In these drawings the heater comprises the fire-pot 1, a radiator 2, up-take pipe 3, discharging through register 4, which latter DAMPER.

1922. Serial No. 565,149.

also covers and forms an inlet for the downtake pipe 5, which brings cold air from the same room into which the up-take pipe discharges.

All of these parts may be of any construction known or desired for hot air furnaces. The tap pipe 6 leads to the room which is to be specially heated. Instead of controlling this pipe by the ordinary damper, I provide a pyramidal'V-shaped hood or deflector. Preferably it comprises upwardly converging end walls '8, 9, an outer wall 10, directly in the path of the main draft, and preferably also another wall 11 adapted to fit the conical surface 7 ofthe furnace casing, to which latter is may be secured as by two bolts 13, 145. In the rear wall 10 is an opening 15 large enough, when open, to per mit escape of most of the draft. This opening, however, is controlled by a flap damper or valve 16, on pivot hinge 17,about which it may swing in position to close said opening at 15 as shown in Fig. 3, or in position to close the pipe 6 as indicated in dotted lines on said figure.

The preferred means for controlling this flap is a shaft 19 which may be conveniently located in pipe 6 at about the same place where the ordinary hot air damper would be located. Said shaft may be provided with an operating handle 20, and also, if desired, with a grooved pulley 21, operated by a chain or cord 22, as shown in Fig. i and extending to the room to be heated or to other desired point of control. d

The shaft 19 is provided with an eccentric or crank pivot 24 supported by radial arms 25, 25, locked to the shaft, as by key pin 26.

The crank pin 24 afiords a pivot for link 27 which is pivoted to the flap 16 as at 28.

The link 27 is formed with a rearward extension 29 passing over the shaft 19 and adapted to stop the crank and link justafter they pass the dead centervand have reached a locking position on the forward stroke. Said link is also cut away as at 31 to afford a similar stop and lock just beyond the dead center in the rearward position.

The length of the link is such with respect to the throw of the crank and the throw of the flap valve that the latter will be firmly pressed to either one of the closed positions and there locked, either in the operative heat-deflecting position shown in Fig. 3, or in the pipe-closing position shown in dotted lines in said figure.

til

It will be noted that the thrust link 27 and the crank element-s 19, 241 and 25 are in toggle-joint relation and that the toggle members are in dead center or looking relati on at both ends of the throw of the flap valve of the damper. This has the double advantage that great power is available for pressing the damper to position at both ends of the stroke of the toggle and of having each of these positions a natural look position.

I claim:

1. A hot air furnace having an inwardly inclined or conical top and a tap pipe ex tending therefrom, in combination with an inverted V-shaped open-bottom hood having one of the V-faces shaped to fit said furnace top around the tap pipe exit and the opposite face projecting into the draft and formed with a large vent opening; and a flap valve hinged in the apex of said hood; and toggle means for operating it to close either one of said openings, said toggle means being proportioned and arranged so that the toggle elements approach dead center relations as the valve approaches each of its closed positions.

2. A hot air furnace having an inwardly inclined or conical top and a tap pipe ex tending therefrom, in combination with an inverted V-shaped open-bottom hood having one of the V-faces haped to fit said furnace top around the tap pipe exit and the opposite face projecting into the draft and formed with a large vent opening; and a flap valve hinged in the apex of said hood; and twoposition operating means comprising a crank shaft, crank and link, the link having a rear extension and bearing surfaces on the main body of the link and on the extension, both adapted to contact with the shaft and stop further rotation of the crank just after the parts have passed either the forward or rearward position of dead center.

3. A hot air furnace and a tap pipe extending laterally therefrom, in combination vith lateral confining walls on opposite sides of the tap pipe exit, a flap valve hinged above said exit and means for swinging it to close said pipe opening or to an outward position where it cooperates with said side walls to deflect drafts into said pipe; together with means for two position operation of said flap valve including a crank shaft, crank and link, the link having a rear extension and bearing surfaces on the main body of the link and the extension, both adapted to contact with the shaft and stop further rotation of the crank just after the parts have passed either the forward or rearward position of dead center.

4. The combination specified by claim 3 with the further feature, that the shaft, the crank, and the link are arranged for slightly greater than a half revolution to give a full diameter throw for the operating movement; and means for stopping ro tation of the crank when the link is near either of its dead center positions.

5. A hot air furnace and a tap pipe extending laterally therefrom, in combination with lateral confining walls on opposite sides of the tap pipe exit, a flap valve hinged above said exit; and means for swinging it to close said pipe opening or to an outward position where it cooperates with said side walls to deflect draft into said pipe, said means including a shaft, crank and link, the link having a rear extension and bearing surfaces on the main body of the link and on the extension, both adapted to contact with the shaft and stop further rotation of the crank near the positions of dead center.

Signed at Corning, in the county of Steu ben, and State of New York this 24th day of May, A. D. 1922.

CYRUS S. HOOD. 

